Web App Engineer (Global Team)

We are seeking passionate and driven international engineers to join our Tokyo-based global engineering team.

Sansan is Japan’s leading business card-based contact management solution for corporations, and one of Japan’s leading SaaS products. Having over 80% market share in Japan, we are now setting our sights on global expansion, starting with Southeast Asia. To this end we have set up a multinational global team within the engineering division. The global team is principally focused on building new features for a global audience, as well as supporting the effective localisation of the product as a whole. We seek motivated and ambitious software engineers to help us in this endeavor; by understanding and improving the product and its features, integrating and scaling it to new markets, and perceiving and prioritising user experience and needs.

Japanese ability is not strictly required, but at least conversational ability is preferred.

You’ll be working in our head office, which is in a great location in the trendy and upmarket Omotesando area of Tokyo.

Development Environment

  • Languages used: C# 7, JavaScript (jQuery, Bootstrap, etc.), LESS
  • Framework: .NET Framework 4.6.1 (ASP.NET MVC, ASP.NET Web Forms, ASP.NET Web API, WPF)
  • Database: PostgreSQL 9.6, Redis 3.2
  • Repository: GitHub
  • Project Management: Confluence, Gantter, Planio, Trello
  • CI/Testing: Jenkins, NUnit
  • Infrastructure: AWS (EC2, S3, SQS, DynamoDB, SES, RDS, ElastiCache, etc.)
  • Operation/Monitoring: Zabbix, Grafana, New Relic, Amazon Elasticsearch Service, Fluentd, Chef

Required Skills

  • At least 5 years experience with web development (preferably using C#.NET Framework, MVC, HTML/CSS/jQuery, RDBMS (PostgreSQL))
  • Able to design domain models, database schemas and system architecture, with some cloud platform experience (preferably AWS)
  • Able to write clean, maintainable and tested code
  • Experience working in a team, doing code-reviews, git-flow, and releasing your own code
  • A confident and forward-looking understanding of user expectations and needs
  • A positive and motivated attitude

Required Languages

  • Native or fluent written and spoken English
  • At least basic Japanese ability is preferred but not required

Employment Details

Employment Type

Full-time (正社員)

Annual Salary

¥6,706,000 – ¥11,522,000


Sansan Head Office Aoyama Oval Building, 5-52-2 Jingumae, Shibuya-ku, Tokyo


Flextime – 8 hours per day
Core working time is 10am – 4pm




Twice annually (January & July)

  • Japanese national health insurance
  • Transportation costs
  • 6 month probation period, with full pay and benefits
  • Salary includes 45 hours overtime pay (irrespective of whether any overtime is worked)
  • Any overtime beyond this will be paid additionally (but is discouraged)

Employee Empowerment

Here are some examples of the benefits which full-time employees can receive.
Please note that most have monthly/annual limits per employee.

Know Me

Company subsidized eating/drinking out with colleagues in different teams.

Geek Seek

The company will pay for work-related books, hardware and software you request.
*Only for engineering and creative positions.


Company subsidized language lessons.


Company subsidized rent for employees living within 2 train stops of Omotesando or Shibuya stations.


Working from home permitted up to 4 days per month.


Weekdays can be taken off in exchange for working on weekends/holidays.


Various benefits for new mothers, such as nursery fee subsidies.


Subsidies for parents of young children, covering babysitting and housekeeping fees.

Charge Leave

3 consecutive paid days off between July & October (not deduced from paid holiday allowance).

  • Weekends & national holidays
  • Annual paid holiday
  • New year holiday

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